Messages in this thread | | | Subject | Re: [PATCH] Longstanding elf fix (2.4.3 fix) | From | (Eric W. Biederman) | Date | 24 Apr 2001 01:19:28 -0600 |
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"Manfred Spraul" <manfred@colorfullife.com> writes:
> > Well looking a little more closely than I did last night it looks like > > access_process_vm (called from ptrace) can cause what amounts to a > > page fault at pretty arbitrary times. > > It's also used for several /proc/<pid> files. > > I remember that I got crashes with concurrent exec+cat > /proc/<pid>/cmdline until down(mmap_sem) was added into > setup_arg_pages().
O.k. Then the race I'm catching is real though because it is confined to bss sections, we are quite unlikely to trigger it.
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